Litter box



FIG. 1 is a perspective view of the litter box of the present invention;

FIG. 2 is front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines are for purposes of illustration only and form no part of the claimed design. 

An ornamental design for a litter box, as shown and described. 